[SOL-1917] Rounding discrepancy between coupon offer landing page and cart

ecommerce/static/js/test/specs/views/offer_view_spec.js

@@ -97,9 +97,9 @@ define([
 
             it('should set new price when setNewPrice called', function() {
                 view.setNewPrice(view.collection.models[0]);
-                expect(view.collection.models[0].get('new_price')).toBe(0);
+                expect(view.collection.models[0].get('new_price')).toBe('0.00');
                 view.setNewPrice(view.collection.models[1]);
-                expect(view.collection.models[1].get('new_price')).toBe(80);
+                expect(view.collection.models[1].get('new_price')).toBe('80.00');
             });
 
             it('should set benefit value when formatBenefitValue called', function() {

ecommerce/static/js/views/offer_view.js

@@ -70,7 +70,7 @@ define([
             setNewPrice: function(course) {
                 var benefit = course.get('benefit'),
                     new_price,
-                    price = parseInt(course.get('stockrecords').price_excl_tax);
+                    price = parseFloat(course.get('stockrecords').price_excl_tax).toFixed(2);
 
                 if (benefit.type === 'Percentage') {
                     new_price = price - (price * (benefit.value / 100));
@@ -81,8 +81,8 @@ define([
                     }
                 }
 
-                course.get('stockrecords').price_excl_tax = Math.round(price);
-                course.set({new_price: Math.round(new_price)});
+                course.get('stockrecords').price_excl_tax = price;
+                course.set({new_price: new_price.toFixed(2)});
             },
 
             formatBenefitValue: function(course) {